Frequently Asked Questions

Frozen coils result from restricted airflow due to clogged filters, low refrigerant from leaks, or blocked return vents. High humidity on the coast amplifies ice buildup when airflow drops. The system continues running but stops cooling, and ice damage can crack refrigerant lines if not addressed quickly.

Oversized equipment cycles on and off too frequently, failing to remove humidity and wearing out components faster. Undersized systems run constantly without reaching set temperatures. Properly sized equipment based on home square footage, insulation, and ductwork maintains steady temperatures while using less energy.

Heat pumps use refrigerant to transfer heat and provide both heating and cooling, so repairs often involve compressors, reversing valves, and refrigerant leaks. Furnaces burn fuel or use electric resistance for heat only, with repairs focused on ignition systems, burners, and airflow components.

Replacement makes financial sense when the furnace is over 15 years old and needs major component work like a cracked heat exchanger or failed blower motor. Repair costs exceeding 50% of replacement value, combined with declining efficiency, indicate replacement provides better long-term value.

UV lights install near evaporator coils and emit ultraviolet radiation that disrupts DNA in mold, bacteria, and viruses passing through the system. This prevents microbial growth on moist coil surfaces and reduces airborne contaminants circulated throughout the home, particularly benefiting families with allergies or respiratory concerns.

Duct leaks waste conditioned air in attics or crawlspaces before reaching intended rooms. Undersized or blocked ductwork restricts airflow to certain areas. Improper damper settings, poor insulation, or single-zone systems trying to serve multiple levels also create hot and cold spots.

Vibration loosens flare connections over time, corrosion pits form on copper lines from moisture exposure, and factory-brazed joints develop cracks under pressure cycling. Coastal humidity accelerates corrosion on outdoor components. Refrigerant doesn't deplete naturally—leaks indicate physical damage requiring repair before recharging.

Seasonal inspections catch worn capacitors, refrigerant drift, dirty coils, and loose electrical connections before they cause failures. Cleaning removes debris that restricts airflow and strains motors. Safety checks identify ignition problems and gas leaks early, preventing failures during peak demand when temperatures extreme.

Mini splits eliminate the need to extend existing ductwork, which often requires major construction and reduces main system efficiency. Each indoor unit operates independently with its own thermostat, providing customized comfort without affecting other zones. Installation involves only a small refrigerant line through the wall.

Upgrading makes sense when replacing a failed mechanical thermostat or when temperature swings exceed three degrees from the set point. Programmable models reduce energy waste during unoccupied hours. Smart thermostats learn usage patterns and allow remote adjustments, improving efficiency without sacrificing comfort when schedules change.

Visible gaps at seams, torn insulation wrapping, or crushed flexible duct indicate damage. Higher than normal energy bills without increased usage suggest conditioned air escaping. Dust buildup around vents, whistling sounds during operation, and rooms that never reach set temperatures all point to duct system leaks.

Gas odors, continuous burner flames that won't extinguish, cracked heat exchangers leaking combustion gases, and electrical burning smells all pose safety risks requiring immediate shutdown and service. Furnaces that cycle on and off every few minutes or produce carbon monoxide detector alerts also need urgent diagnosis.